| Nik Viljoen | |
| Fullname: | Nicolas Viljoen |
| Position: | Striker |
| Birth Date: | 3 December 1976 |
| Birth Place: | New Zealand |
| Youthclubs1: | Pakuranga Town |
| Years1: | 1995–1996 |
| Years2: | 1996 |
| Years3: | 1996–2001 |
| Years4: | 2002–2003 |
| Years5: | 2003 |
| Clubs1: | Rotherham United |
| Clubs2: | North Shore United |
| Clubs3: | Waitakere City |
| Clubs4: | Fencibles United |
| Clubs5: | East Auckland |
| Caps1: | 8 |
| Goals1: | 2 |
| Nationalyears1: | 1996–1997 |
| Nationalteam1: | New Zealand |
| Nationalcaps1: | 10 |
| Nationalgoals1: | 2 |
Nicolas "Nik" Viljoen (born 3 December 1976) is a New Zealand footballer who represented New Zealand at the international level.
Viljoen scored the winner after coming on as a substitute in his full All Whites debut, a 1-0 win over Oman on 29 September 1996[1] and ended his international playing career with 10 A-international caps and 3 goals to his credit,[2] [3] his final cap an appearance in a 0-2 loss to Indonesia on 21 September 1997.